General description Sealey Premier Extension Bar 3/4" Square Drive 400mm is a robust tool designed for professional use. It is made from forged Chrome Vanadium steel, ensuring durability and strength for various applications. The extension bar features a spring-ball socket retainer for secure attachment. Technical specifications Length: 400mm Material: Chrome Vanadium steel Model No.: S34/E400 EAN: 5024209040402 Other information